What implication(s) does the second law of thermodynamics have for biological systems regarding entropy?

A、
Systems cannot create energy because it is neither created nor destroyed.
B、
With each transformation, less energy is available to do work, so older systems have less energy.
C、
A constant supply of energy is necessary for maintenance of biological systems.
D、
Energy is unlimited because it is used and reused by living organisms.
E、
None of these is an implication of the second law of thermodynamics.